syntax: regexp
\.a?[12578vqki]?$
^(dev|fd|net|srv|env|root|mnt|n)/
^(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/(bin|lib)/
^acme/bin/(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/